smc Pentax 67 35mm F/4.5 Fisheye
Fisheye lens • Film era • Discontinued
- Announced:
- · November 1989
- Production status:
- ● Discontinued
- Country of design:
- · Japan
- Original name:
- · SMC PENTAX 67 FISH-EYE 1:4.5 35mm
- Class:
- · Slow 6x7 medium-format diagonal fisheye lens
- · Professional model (Top class)
- System:
- · Pentax 6×7 (1969)
Abbreviations
| SMC | Multi-layer anti-reflection coating is applied to the surfaces of lens elements. This anti-reflection coating increases light transmission, eliminates flare and ghosting, and maintains color consistence among all lens models. |
| FISHEYE | An ultra-wide angle lens with strong uncorrected barrel distortion and extreme angle of view. |
Model history (3)
| ■Asahi Fisheye-Takumar 6×7 35mm F/4.5 | A | 11 - 7 | 0.45m | -- | 1969 ● | |
| ■Asahi Super-Multi-Coated Fisheye-Takumar 6×7 35mm F/4.5 | A | 11 - 7 | 0.45m | -- | 1971 ● | |
| ■smc Pentax 67 35mm F/4.5 Fisheye | A | 11 - 7 | 0.45m | -- | 1989 ● | |
Specification
| Optical design: | |
| Medium format 6x7 | |
| 35mm | |
| F/4.5 | |
| 11 elements in 7 groups | |
| Diagonal (full-frame) fisheye | |
| Pentax 6x7 [84.95mm] (Inner mount) | |
| 180° | |
| Diaphragm mechanism: | |
Diaphragm type: | Automatic |
Aperture control: | Aperture ring (Manual settings only) |
| 8 (eight) | |
| Focusing: | |
| 0.45m | |
| <No data> | |
Focusing modes: | Manual focus only |
Manual focus control: | Focusing ring |
| Physical characteristics: | |
| 900g | |
| ⌀102×73mm | |
| Accessories: | |
| Removable front filters are not accepted | |
| Built-in UV, Y2, O2, R2 (part of the lens optical system) | |
Additional features: | Rear gelatin filter holder |
| Not available | |
| <No data> |
Sources of data
- Pentax 67 interchangeable lenses operating manual.
- Pentax 67 operating manual (PUB. 56801) (October 1992).
- Pentax - A complete selection of top-performance cameras booklet (PUB. 040201) (October 1997).
Typical characteristics of fisheye lenses
- Extreme angle of view (at least 180° diagonally);
- Circular types (the image circle of the lens is inscribed in the image frame) or diagonal types (cover the entire image frame);
- Usually of equidistant projection type, with the distance from the picture center to any given point always proportional to the angle from the optical axis to that point;
- Huge barrel distortion;
- Short closest focusing distance (0.20 - 0.30m with 35mm full-frame prime lenses);
- Very large depth of field, eliminating the need for autofocus or precise manual focusing;
- Due to the extreme angle of view and convex front element, front filters cannot be used;
- Often equipped with a filter turret with swivel-mounted filters;
- Often come with a small, built-in petal-shaped lens hood.
Other fisheye lenses in the Pentax 6×7 system
| ■Pentax 6x7 mount (2) | |||||||||
| Asahi Fisheye-Takumar 6×7 35mm F/4.5 | A | 11 - 7 | 0.45m | -- | 1969 ● | ||||
| Asahi Super-Multi-Coated Fisheye-Takumar 6×7 35mm F/4.5 | A | 11 - 7 | 0.45m | -- | 1971 ● | ||||